GWT-Ext is a
powerful widget library that provides rich widgets like Grid with sort,
paging and filtering, Tree's with Drag & Drop support, highly
customizable ComboBoxes, Tab Panels, Menus & Toolbars, Dialogs,
Forms and a lot more right out of the box with a powerful and easy to
use API. It uses GWT and Ext 2.0.2 LGPL.